Greenwich Connecticut Climate Data

Monthly Average Climate Data for Greenwich Connecticut

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.3 °C3.8 °C100.58 mm
February-3.9 °C4.9 °C73.91 mm
March-0.2 °C8.7 °C105.66 mm
April5.3 °C15.1 °C102.87 mm
May10.6 °C20.7 °C96.52 mm
June16 °C25.6 °C116.33 mm
July19.3 °C28.8 °C100.58 mm
August18.8 °C27.7 °C117.09 mm
September14.8 °C24.3 °C121.41 mm
October9.1 °C18 °C113.79 mm
November3.8 °C12.1 °C99.31 mm
December-0.6 °C6.7 °C112.52 mm
Annual7.4 °C16.4 °C1260.57 mm

Climate Data for Greenwich Connecticut

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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